Android约束布局ConstraintLayout的Guideline，CardView

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guide_line"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.67" />

    <androidx.cardview.widget.CardView
        android:id="@+id/card"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:cardBackgroundColor="@android:color/holo_orange_light"
        app:cardCornerRadius="20dp"
        app:layout_constraintDimensionRatio="1:1"
        app:layout_constraintEnd_toEndOf="@id/guide_line"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <androidx.appcompat.widget.AppCompatImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scaleType="centerCrop"
            android:src="@drawable/ic_launcher_foreground" />
    </androidx.cardview.widget.CardView>


    <androidx.cardview.widget.CardView
        android:id="@+id/v1"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:cardBackgroundColor="@android:color/holo_green_light"
        app:cardCornerRadius="20dp"
        app:layout_constraintBottom_toTopOf="@id/v2"
        app:layout_constraintDimensionRatio="1:1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="@id/guide_line">

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scaleType="centerCrop"
            android:src="@drawable/ic_launcher_foreground" />
    </androidx.cardview.widget.CardView>

    <androidx.cardview.widget.CardView
        android:id="@+id/v2"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:cardBackgroundColor="@android:color/holo_red_light"
        app:cardCornerRadius="20dp"
        app:layout_constraintDimensionRatio="1:1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="@id/guide_line"
        app:layout_constraintTop_toBottomOf="@id/v1">

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scaleType="centerCrop"
            android:src="@drawable/ic_launcher_foreground" />
    </androidx.cardview.widget.CardView>
</androidx.constraintlayout.widget.ConstraintLayout>

约束布局里面，用到match_parent的地方，可以考虑换成0dp试试。

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